It might be cleaner to have the action take place in the view you are navigating to, using .onAppear?

Generally, you would add a new Target to the iOS project. Then you can share code that is common to both targets, and have other code files that are target-specific. In shared code files, it is possible to mark code as applying only to a specific platform.

Just pass the Preview a Timer... struct TimerRow_Previews: PreviewProvider { static var previews: some View { TimerRow(timer: Timer()) } }

The error message should be self explanatory? In SwiftUI, you can not just write arbitrary code, when a View is expected. Remember that you are declaring a UI. Try replacing your "for" loop with this SwiftUI code: ForEach(cities, id: \.self) { city in Text("City: \(city)") }

We can't do much with a screenshot of a tiny sample of your code, and truncated error messages! Please post more code, in a code block, using "Paste & Match Style" (to preserve formatting). Also post the error messages, in full.

Interestingly, if I add another modifier to the first Rectangle, the fade-in works! Rectangle() .fill( fade ? .red : .blue) .frame(width: 100, height: 100, alignment: .center) .opacity(fade ? 0 : 1) SwiftUI can only animate viewModifiers for Views that are already on-screen. I think what is happening is that when the opacity is set to 0, SwiftUI removes that view from the screen... ...so it's re-appearance (on setting opacity to 1) is not animated. As a test, try fading out, but not right to 0: .opacity(fade ? 0.1 : 1) This seems to work.

Did that fix it for you, @MrMajorThorburn?

You are declaring "tagUID" in a class, so you should not be using the @State property wrapper (which is for SwiftUI). Try removing the "@State"... just use: var tagUID = "UID" Or since your NFCReader is an ObservableObject, you may mean: @Published var tagUID = "UID"

This is called the "Minimap". The menu for this in on an icon at the top-right of Xcode... (the middle of the three lower buttons, in the screenshot.)

No. (At least, not for users of the Forum)

{Comment removed}

It's not just Xcode. This is now a system setting, for full-screen apps. System Preferences > Dock & Menu Bar > Automatically hide and show the menu bar in full screen

MVVM, where: Model is value types (structs) Views are value types (SwiftUI Views) ViewModel is a reference type (a class), so it can be passed around the app, and an ObservableObject (so Views can respond to changes)

Have you considered rewriting it as a method that tests each Bool individually, and returns the overall Bool result? Perhaps something like... func include() -> Bool { if !filters.showhjertestarterOnly || havneplan.hjertestarter { return true } if !filters.showpaabroerneOnly || havneplan.paabroerne { return true } /// And so on, through your 47 Bools... return false }

I don't know how to solve your issue, but perhaps this clue will help... In SwiftUI, a ViewBuilder is limited to a maximum of 10 Views. It looks like there may be a similar limit to filters? I found your code a bit confusing (json doesn't seem to have any relevance), but I suspect there may be a more elegant solution. Would you like to post a bit more about what you are trying to achieve, and how (and why)?